Oil burner



R. C. HOPKINS OIL BURNERV April 16, 1929. 1,709,174

lFiled Jan. l5, 1925 latented Apr. 16, 1929,

- UNITED vSTATES ROBERT C. HOPKINS, OF ALLIANCE, OHIO.

011. BURNER. .l

Application filed January i, This invention relates to burners of the class wherein oil'is mixed with a Vblast of air Vso as to be discharged and burned in combustible mixture therewith.

VThe objects of the invention are to provide a burner of this characterV in which the nozzle is surrounded byl an annular chamber to which'oil is supplied, the oil being thus preheated and discharged from the annular chamber through nipples, into the nozzle and in the path of an air blast, whereby the oil is atomized and mixed with the Vair and discharged from the nozzle in a combustible mixture; to provide an adjustable ring within the nozzle for controlling the flame; to provide a shut-off arranged to automatically cover the nozzle to shield the same when the burner is turned oil; and to generally improve and simplify a burner of this type.

The above and other objects may be attained by 'constructing the burner in the manner illustrated in the accompanying drawing, in which,

' Figure 1 is a longitudinal sectional view r through a burner embodying the invention;

Fig, 2, a section on the line 2 2, Fig. 1; Fig. 3, a section on the line 3 8, Fig. 1, and Fig. 4, a rear end elevation ot the burner. Similar numerals of reference indicate corresponding parts throughout the drawing.

A T shaped hollow casting isshown at 1 and provided with the central outlet 2 communicating with the air inlet pipe 3 through which air under pressure is admitted te the,

burner. One end of the casting may be closed as by the threaded plug 4, and the opposite end is provided with the threaded opening 5 in which is located the threaded extremity of the tubular casing 6 and the threaded valve seat 7. The tube 6 and valve seat may be thus adjusted withinv the threaded opening 5 and tightened therein, one ot said members serving as a jam nut to prevent accidental displacement of both memr bers.

The discharge nozzle 8 of the burner is provided with a sleeve 9 fitting upon the outer extremity of the tubular casing 6, and an annular oil reservoir or chamber 10 surrounds the nozzle whereby the oil is preheated by the llame. VOil is supplied to the reservoir 10 as by the oil pipe 11, and conveyed to the nozzle by means ot the radially disposed nipples or jets 12, the ends ot which are preferably beveled rearwardly as shown at 13.

13, 1925. Serial N0. 2,061.

The oil reservoir is provided with threaded openings 12a, aligned with the nipples 12, and normally closed by the threaded plugs 12b. 1 When the burner is in use it can easily be cleaned. by removing these plugs and Vrodding out the obstruction with a wire.

For the purpose of controlling the flame, as by controlling the velocity and location oit passage of air through the nozzle, a ring valve 14, of triangular cross sectional shape, is mounted for longitudinal adjustment within the nozzle adjacent the nipples 12 as shown in Fig. 3, and the nozzle side of the opening in the ring 14 being smaller than the air blast side of the nozzle. This ring may be adjusted by the stem 15, connected to the ring as bythe yoke 16 and provided with the threaded portion 17 extended through a threaded aperture 18 in the bracket 19, a knob 2O being provided upon the rear end ot the stein for rotating the same to project the ring against the inner tapered wall of the nozzle as shown in Fig. 1, whereby the air blast is reduced to the interior diameter ot Y the ring, or to withdraw the ring rearwardly whereby air may pass around the outside ol the ring also. y

The blast gate 21 for regulating the supply of air may be in the form of a disk having a central opening 22 to accommodate the stem 15, and carried upon aV blast gate adjusting rod 23 slidably mounted through the plug 4 and bracket 19, the rear extremity thereof being bent at an angle and located transversely through the sleeve 24 which is slidably supported at one side of the burner as by the bracket 25.

A rod 26 is rotatably mounted in a bearing 27 formed at one side of the nozzle and slid ably extended into the sleeve 24, a radial pin 27 upon said rod being located through the spiral slot 28 in the sleeve. A shut-ofi, in the form oi' a disk 29, is fixed to the forward end of the rod 26 and arranged to be located in front of thenozzle when the blast gate 21 is in the closed position, as shown in Fig. 1.

In operating the burner the sleeve 24 is pulled rearwardly and, through the rod 23, the blast gate 21 is opened permitting the blast of air to pass through the nozzle. As the sleeve 24 is moved in this direction the pin 27, upon t-he rod 26, riding in the spiral slot 28 of the sleeve will cause the rod 26 to rotate upon its axis, swinging the shut-oli 29 away from the nozzle. The oil supply is of course independently controlled, and when the oil is turned on the reservoir l0 Will be a combustible mixture.

The llame may be controlled by adjusting the ring 14 Within the nozzle toincrease or decrease the air passage. v

The shut-0H 29 is especially adapted for use Where burners are provided at opposite sides of a furnace. operating it Will be seen that the shut-olf lupon the burner not in operation prevents the products of combustion from being forced into the same, thus maintaining theinterior ot the burner free from carbon and the like.

l claim:

l. A burner including a tubular casing having a nozzle at one end, a valve VWithin the casing, a sliding rod connected to the valve, a sleeve connected to the rod and provided vvith a. spiral slot, a rod rotatably mounted Within the sleeve and having a pin located in said slot and a shut-ottq carried by the rotatable rod and arranged to be moved in front of the nozzle by the closing of said valve.

2. An oil burner including a tubular casing, an air inlet at one end portion of the casing, a discharge nozzle at the other end portion of the casing, an annular oil prevheating chamber surrounding the discharge nozzle, an oil supply for the burner communicating With the pre-heating chamber, a ring valve controlling the velocity and location ot passage oitl air through the nozzle, there being a central opening in the ring valve for the passage ot air therethrough, means exterior of the casing for longitudinally adjusting the position of the ring valve Within the nozzle, a nipple communicating with the pre-heating .chamber and opening adjacent the ring valve, whereby air passing through the central opening in the ring valve Will atomize the oil discharged from the nipple, a blast gate for regulating the sup ply of air, and means for adjusting the blast gate.

It, only one burner is 3. An oil burner including a tubular casing, an air inlet at one end portion otl the casing, a discharge nozzle at the'other end portionoif' the casing, an annular oil pre-heating chamber surrounding the discharge nozzle, an oil supply ior the burner communicating With the pre-heating chamber, a ring valve triangular in cross section controlling the velocity and location ot' passage of air blast through the nozzle, there being a central opening in the ring valve for the passage of air therethrough, the nozzle side ot the opening beingy smaller than the air blast side of the opening, means exterior of tne casing for i longitudinally adjusting th-e position Ot the ring valve Within the nozzle, a radially disposed nipple'communicating with the preheating chamber and opening adjacent the ring valve, the end of said nipple being beveled rearwardly, whereby air passing through the central opening in the ring valve Will atomize the oil dischargec'l from the nipple, a blast gate itor regulating the supply of air, andv means for adjustmgthe blast gate.

4:. An oil burner including a tubular casing, an air inlet at one end portion ot the casing, a discharge nozzle at the other end portion of the casing, an annular oil preheating chamber surrounding the discharge nozzle, an oil supply for the burner conimunicating With the pre-heating chamber, a ring valve controlling the velocity and location of passage O air through the nozzle, there being a central opening in the ring valve ior 'the passage ot' air therethrough, mea-ns exterior of the casing for longitudinally adjusting the position of the ring valve Within the nozzle, a nipple communicating with the pre-heating chamber and opening ladjacent the ringvalve, whereby air passing .through the central opening in the ring valve will atomize the oil discharged from the nipple, a blast gate for regulating Vthe supply oi' air, a shut-off supported adjacent to the nozzle, and means co-ordinating the closing ot' the blast gate and the projecting of the shutott' in front of the nozzle.

In testimony 'that l claim the above, l have hereunto subscribed my naine.

Roer. c. normas. 

